Casio QT-6600

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A-6. Secure it with 17 screws.
NOTE: Tighten the screws in the order of the numbers indicated in the illustration below.
11 1 3 9
15
8
6
14
13
5
7
16
10 4
2
12
17
A-7. Engage the COM Chassis and the Main PCB, and then secure them with five screws.
Screws (S5)